Billmon expresses my affinity for London far better than I ever have.

If your mother tongue is English, and you loved stories as much as I did as a child, then London is the city of your imagination, of Mary Poppins and David Copperfield, of London-bridge-is-falling-down and the prince and the pauper. And if you’ve been there, and visited the places you dreamed about as a boy, and ridden the tube to Picadilly [sic] Circus, and climbed the stairs of the Tower of London, and strolled through Hyde Park in the morning fog, then what happened today hurts more than maybe it should, logically.

I first visited the city in 1984. Piccadilly Circus was a construction site, the Docklands light railway had just opened, I discovered the Greenwich tunnel, and I rode and walked all over the place. It’s easily my favorite city, not excluding the one I live in now.
I feel for you, London.